Toku (styled TOKU) is a Japanese jazz musician from Niigata Prefecture, Japan.
In addition to being one of the few professional jazz vocalists and flugelhorn players in Japan, he is known for promoting jazz in Japan and bringing elements of the genre into J-pop through collaborations with other artists. He has worked with clammbon, Miki Imai, Maki Oguro, Yuji Ohno, Mariko Takahashi, Ken Hirai, DOUBLE, m-flo, and Exile.